package com.atguigu.gmall.realtime.dim.function;

import com.alibaba.fastjson.JSONObject;
import com.atguigu.gmall.realtime.common.bean.TableProcessDim;
import com.atguigu.gmall.realtime.common.util.JdbcUtil;
import org.apache.flink.api.common.state.BroadcastState;
import org.apache.flink.api.common.state.MapStateDescriptor;
import org.apache.flink.api.common.state.ReadOnlyBroadcastState;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.streaming.api.functions.co.BroadcastProcessFunction;
import org.apache.flink.util.Collector;

import java.sql.Connection;
import java.util.*;

/**
 * @author Felix
 * @date 2024/10/30
 * 对关联后的数据进行处理(过滤出维度)
 */
public class TableProcessFunction extends BroadcastProcessFunction<JSONObject, TableProcessDim, Tuple2<JSONObject, TableProcessDim>> {
    private Map<String,TableProcessDim> configMap = new HashMap();
    private MapStateDescriptor<String, TableProcessDim> mapStateDescriptor;

    public TableProcessFunction(MapStateDescriptor<String, TableProcessDim> mapStateDescriptor) {
        this.mapStateDescriptor = mapStateDescriptor;
    }

    //将配置表中的配置信息预加载到程序中，解决主流数据先到，广播流数据后到的问题
    @Override
    public void open(Configuration parameters) throws Exception {
        Connection mySqlConnection = JdbcUtil.getMySqlConnection();
        String sql = "select * from gmall0522_config.table_process_dim";
        List<TableProcessDim> tableProcessDimList = JdbcUtil.queryList(mySqlConnection, sql, TableProcessDim.class, true);
        for (TableProcessDim tableProcessDim : tableProcessDimList) {
            configMap.put(tableProcessDim.getSourceTable(),tableProcessDim);
        }
        JdbcUtil.closeMySqlConnection(mySqlConnection);
    }

    //处理主流数据               根据当前处理的数据的表名到广播状态中获取对应的配置信息，如果能够获取到，
    // 说明是维度，传递到下游；如果获取不到对应的配置信息，说明不是维度，直接不做处理
    @Override
    public void processElement(JSONObject jsonObj, BroadcastProcessFunction<JSONObject, TableProcessDim, Tuple2<JSONObject, TableProcessDim>>.ReadOnlyContext ctx, Collector<Tuple2<JSONObject, TableProcessDim>> out) throws Exception {
        //{"database":"gmall0522","data":{"tm_name":"Redmi","create_time":"2021-12-14 00:00:00","logo_url":"aaa","id":1},"type":"update","table":"base_trademark","ts":1730251744}
        //System.out.println(jsonObj);
        //获取业务数据库维度表的表名
        String tableName = jsonObj.getString("table");
        //获取广播状态
        ReadOnlyBroadcastState<String, TableProcessDim> broadcastState = ctx.getBroadcastState(mapStateDescriptor);
        //根据表名到广播状态中获取对应的配置信息
        TableProcessDim tableProcessDim = null;

        if((tableProcessDim = broadcastState.get(tableName)) != null
                || (tableProcessDim = configMap.get(tableName)) != null){
            //如果配置对象不为空，说明当前处理的是维度。将data属性部分和配置对象封装为Tuple2向下游传递
            //{"tm_name":"Redmi","create_time":"2021-12-14 00:00:00","logo_url":"aaa","id":1}
            JSONObject dataJsonObj = jsonObj.getJSONObject("data");

            //在向下游传递数据前，过滤掉不需要传递的字段
            //{"tm_name":"Redmi","id":1}
            String sinkColumns = tableProcessDim.getSinkColumns();
            deleteNotNeedColumns(dataJsonObj,sinkColumns);
            //在向下游传递数据前，补充对业务数据库维度表进行的操作类型
            //{"tm_name":"Redmi","id":1,"type":"update"}
            String type = jsonObj.getString("type");
            dataJsonObj.put("type",type);

            out.collect(Tuple2.of(dataJsonObj,tableProcessDim));
        }

    }

    //处理广播流数据    将配置信息放到广播状态中去或者从广播状态中删除对应的配置    k:表名    v:实体类对象
    @Override
    public void processBroadcastElement(TableProcessDim tableProcessDim, BroadcastProcessFunction<JSONObject, TableProcessDim, Tuple2<JSONObject, TableProcessDim>>.Context ctx, Collector<Tuple2<JSONObject, TableProcessDim>> out) throws Exception {
        //获取对配置表进行的操作类型
        String op = tableProcessDim.getOp();
        //获取广播状态
        BroadcastState<String, TableProcessDim> broadcastState = ctx.getBroadcastState(mapStateDescriptor);
        //获取业务数据库维度表表名(key)
        String sourceTable = tableProcessDim.getSourceTable();
        if("d".equals(op)){
            //说明从配置表中删除了一条配置信息  需要将广播状态中对应的配置信息也删除掉
            broadcastState.remove(sourceTable);
            configMap.remove(sourceTable);
        }else{
            //说明对配置表进行了读取、添加或者是更新操作  需要将读取到的或者新添加的或者更新后的数据 更新到广播状态中
            broadcastState.put(sourceTable,tableProcessDim);
            configMap.put(sourceTable,tableProcessDim);
        }

    }

    //过滤掉不需要传递的字段
    //dataJsonObj: {"tm_name":"Redmi","create_time":"2021-12-14 00:00:00","logo_url":"ccc","id":1}
    //sinkColumns: id,tm_name
    public void deleteNotNeedColumns(JSONObject dataJsonObj, String sinkColumns) {
        List<String> columnList = Arrays.asList(sinkColumns.split(","));
        Set<Map.Entry<String, Object>> entrySet = dataJsonObj.entrySet();
        entrySet.removeIf(entry->!columnList.contains(entry.getKey()));
    }
}
